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Pluto a planet

Pluto a planet

Pluto a planet

Pluto is not a planet, a new study has found. Scientists said earlier this year that Pluto, which was previously classified as a "dwarf planet," just became a full-fledged member of the solar system. The dwarf planet is so small that it has no real atmosphere, which would be necessary for it to qualify as a planet. The discovery didn't sit well with some students, who took to social media to share their opinion on the matter with their peers.

Planet

Several thousands of planets have been discovered orbiting around other stars in the Milky Way. These are referred to as "extrasolar planets" or "exoplanets.” As of 1 December 2021, 4,878 known extrasolar planets in 3,604 planetary systems have been discovered. The planetary systems figure includes 807 multiple planetary systems. The exoplanets range in size from just above the size of the Moon to gas giants about twice as large as Jupiter. More than 100 planets are the same size as Earth, nine of which are at the same relative distance from their star as Earth is from the Sun, i.e. they are in the circumstellar habitable zone.

The first civilization known to have a functional theory of the planets were the Babylonians, who lived in Mesopotamia in the first and second millennia BC. The oldest surviving planetary astronomical text is the Babylonian Venus tablet of Ammisaduqa, a 7th-century BC copy of a list of observations of the motions of the planet Venus, that probably dates as early as the second millennium BC.though this had long been known by the Babylonians. In the 3rd century BC, Aristarchus of Samos proposed a heliocentric system, according to which Earth and the planets revolved around the Sun. The geocentric system remained dominant until the Scientific Revolution. (Source: en.wikipedia.org)

 

 

 

 

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